<template>
    <div>
            <!-- 顶部滑动条区域 -->
       		<div id="slider" class="mui-slider">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<a :class="['mui-control-item',item.id==0 ?'mui-active':'']" v-for="item in cates" :key="item.id" @click="getPhotoListByCateId(item.id)">
							{{item.title}}
						</a>
					</div>
				</div>
			</div>
            <!-- 图片列表区域 -->
            <ul class="photo-list">
        <router-link :to="'/home/photoinfo/'+item.id" v-for="item in list" :key="item.id" tag="li">
            <img v-lazy="item.img_url">
            <div class="info">
            <h1 class="info-title">{{item.title}}</h1>
            <div class="info-body">{{item.zhaiyao}}</div>
            </div>
            </router-link>
        </ul>
    </div>
    
</template>
<script>
//导入mui的js文件
import mui from '../../lib/mui/js/mui.min.js'

export default {

        data() {
            return {
                cates:[],//所有分类的列表
                list:[] //图片列表的数组
            }
        },
        methods: {
            getALLCategory(){
                //获取所有的图片分类
                this.$http.get('api/getimgcategory').then(result=>{
                    if (result.body.status===0) {
                        result.body.message.unshift({
                            title:"全部",
                            id:0
                        })
                        this.cates=result.body.message
                    }
                })
            },
            getPhotoListByCateId(cateId){
                //根据 非类id 获取图片列表
                this.$http.get('api/getimages/'+ cateId).then(result=>{
                    if (result.body.status===0) {
                        this.list=result.body.message;
                    }
                })
            }
        },
        created() {
            this.getALLCategory(),
            //默认进入页面,就主动请求 所有图片列表数据
            this.getPhotoListByCateId(0);
        },
        //如果要操作元素了,最好在mounted里面,因为,这时候的DOM元素是最新的
        mounted() { //当组件中的DOM结构被渲染好并放到页面中后.会执行这个 钩子函数
            //2.初始化滑动控件,
        mui('.mui-scroll-wrapper').scroll({
	deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
});
        },
}
</script>

<style lang="scss" scoped>
    *{
        touch-action: pan-y
    }
    
.photo-list{
    list-style: none;
    margin: 0;
     padding: 0.625rem;
     padding-bottom: 0;
    li{
        background-color: #ccc;
        text-align: center;
        margin-bottom: 0.625rem;
        box-shadow: 0 0 0.375rem  #999;
             position: relative;
             overflow: hidden;
        img{
            width: 100%;
            vertical-align: middle;
        }
    img[lazy=loading] {
 width: 2.5rem;
 height: 18.75rem;
  margin: auto;
}
.info{
    color: white;
    text-align: left;
    position: absolute;
    bottom: 0;
    background-color: rgba(0,0,0,0.4);
    max-height: 5.25rem;
    .info-title{
      font-size: 0.875rem;
    }
    .info-body{
    font-size: 0.8125rem;
    }
}
    }
}
</style>
